0.4.0

This release adds the ability to have custom auditors. This is documented in the README, showing an example of how to create an auditor to generate findings for any policy that grants access to a sensitive S3 bucket: https://github.com/duo-labs/parliament#custom-auditors

This also changed how the filtering works for ignoring findings, which gives some greater control over that, by changing what had been a search for a substring into a full regex match. The regex match does mean that a search for a substring like s3:* now must be written as .*s3:\\*.* (note that .* are added to the ends so this function as a substring lookup, and the original * needs to be double-escaped as \\*).